time travel

there are times when I think about the past, perhaps even dwell there for a while. I consider events in my life and I wonder what would have happened if I had made a different decision, walked away,said yes\no, spoken my mind etc. I also see the lessons in what has happened and, hopefully am a wiser person because of that.
Now, if i can just put myself in the future and apply that retrospective to the decisions I make today...............